How To Replace Rotten Purlins Under Barn Roof

Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern.

How to replace rotten purlins under barn roof.

The process of replacing existing rafters so that your roof remains intact without removing the roof to do it requires some basic carpentry skills and a few common tools. I am building an all wood pole building. A challenge occurs when clients look to insulate between their roof purlins. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.

We used 2 6 stock and doubled them up installing them under the main barn beam. Reader john in covington writes. The purlins are 2x8s. Over time roof rafters can wear crack or rot and replacements may be in order.

It was very easy. You can install a new fascia board in a couple of hours with the right tools to d. I want to insulate the walls and up at the purlins to keep as much usable space as possible with an insulated building. This approach allowed us to save 90 percent of the original post that was not rotted and kept the old barn look.

Change a rotten or damaged fascia board. Use a flat garden spade to remove the shingles and inspect the sheathing to ensure there s no rot.